Vertical-disk grinding-mi ll



(N0 Medal.) x 2 Sheets-Sheet 1. H. CUTLER. VERTICAL DISK GRINDING MILL.

No. 283,828. Patented Aug. 14, 1888.

INVENTOR:

ATTORNEYS.

(N0 Model.) 2 Sheets-Sheet 2.

H. CUTLER. VERTICAL DISK GRINDING MILL.

Patented Aug. 14, 1883.

INVENTOR ATTORNEYS.

N. FEYERS. Phclohlhognphan Wahinmn. D C

U' rrso STATES" HEX-RY ClJTLER, OF NORTH WILBRAHAM, MASSACHUSETTS.

VERTICAL-DISK GRlNDlNG-MILL.

SPECIFICATION forming part of Letters Patent No. 283,328, dated August 14,1883.

" Application filed May 1 1883. (No model.)

To aZZ whom, it may concern.-

Be it known that I, HENRY C TLER, of North W'ilbraham, in the county of Hampden and State of Massachusetts, have invented a new and Improved Vertical-Disk Grinding- Mill, of which the following is a full, clear, and exact description.

The object of my invention is to improve disk grinding-mills, as hereinafter described,

-, is a plan view, showing a modified arrangethe spindle-bearings.

tion of the mill as arranged in Fig. 5, and

ment of the supporting devices for enabling the stones to be self-adjusting to the wear of Fig. 6 is a side eleva- Fig. 7 is a perspective View of part of the case.

Vertical-disk mills run at very high speed, and the boxes wear rapidly; the belt-pulley is always on the end of the spindle and tending to pull the spindle out of line. In the common way of hanging the millstone the spindle soon gets out of line, causing the'faces of the stones to touch each other at an angle. This wears the face of the running-stone in a conical form, and one side of the bed-stone will be beveled off by the same cause. Well-adjusted millstones should be so true and exact at their faces that they will'run within only a hundredth part of an inch without striking together. The wearing of a spindle-box a sixteenth of an inch will therefore spoil a mill for good work. I

My self-adjusting mill is constructed with thebed-stone a firmly setina strong iron case,b, from which it need never be moved. until entirely worn 01?. The running-stone c is attached firmly to the spindle d. The case b has journals or trunnions e, which are fitted in the housing-framef, standing on the base 9, which has a vertical center pivot or journahh, on which the frame may 'turn or adjust hori- -much it may wear vertically.

zontally. The case I) also has a bracket, 1', in

which the spindle d has a'bearing atone end, 7 so as to turn with the case, while the other end of the spindle, on which the driving-pulleyj is mounted, has a bearing in-the standard it, which is secured to the foundation independently of the stone-supporting frame, so that the spindle, stones, case, and bearings 43 may all turn on the pivot h to line properly with the bearing 75, as it may wear laterally by the pull of thebelt. At the same time the trunnions allow the case to shift vertically, so as always to line with the spindle-bearing, no matter how Thus it will be seen that I have my mill mounted on supports, allowing, practically, universal adjustment, so that the stones and spindle cannot change their relation to each other.

I am aware that there are mills that have trunnions on the bed-stone, with boxes that can be adjusted by hand, but none with boxes moving in a circle, and with a spindle-bearing attached to the bed-stone or casethat is to say, none that have the four ways of adjustment above describedviz., trunnions and spindle-bearing attached to the bed-stoneor case, with a journal or pivot on the bed-frame,

holding the trunnions in such a manner as to be equivalent toa universal joint, or equiva lent to two stones hung on one shaft, and being therefore self-adj usting.

Instead-of the bed-frame being fitted with the pivot h, the trunnion-supportsf are made shorter and mounted on a ring, Z, Figs. 5 and 6, which, being supported on the frame m, so as to turn, will accomplish the same thing, and is practically the same device so far as the operation is concerned. The ease I) is made in two parts, which separate alongthe line 0 p q,

. and the st one is made accessible, when required,

by the removal sidewise of the upper part,.b, from the lower part, b, which latter is made very strong, and has the trunnions cast together with it, or firmly attached to it, for the support of the bed-stone, which is never removed from it. When the stones are to be dressed, the running-stone and spindle are removed, after previously removing the upper part, b, of the case b, and the bed-stone is turned face up on the trunnions therefor.

In a verticaldisk mill the weight of the millscrew is used for the purpose.

' strain is produced when the stone is running at high speed,which breaks the stones or frame, or both. I use for this purpose a weight, 12,

attached by awirerope or chain, w, to the rim of a pulley, 00, the pulley having a pinion, 9 which gears with atoothed rack, z, on the pressgether by pulling the lever 0 against the end of the spindle at d. This weight is heavier than is required to hold the millstones together, but the excess of the weight is prevented from effectin'g any unnecessary friction on the end'of the spindle by ascrew, 6, on the presser-rod a", having a hand-wheel nut, f, on it, which is used, together with said' weight, to adjust the stones at a proper distance from each other. This pressure-rod a is made to act on the other end, of the spindle at the same time by a lever, h, for positively controlling the stonesin their movements toward. and from each other. When any iron or other foreign substance gets into the mill, the weight attached to the pulley geared with the pressure-rod will be lifted and the substance will pass safely through, after which the stones will return to their proper adjustment, the adjusting nut or wheel f shifting away from its bearing 6 with the rod and returning again thereto without turning on the ro For adjusting. the running-stone on the spindle to make up the loss caused by wearing away of both the runner and the bed-stone, I make the collar j, by which the runner c is connected to the spindle, in twoparts, to be clasped on the spindle and fastened together by bolts 70, the collar being provided with an internal lip or flange, l, which fits into a groove, m, in the spindle,'which is provided with a series of such grooves, so that by opening the collar fromtime to time and shifting the stone along the spindle it may be set up frequently with but very little trouble, so that the bed-stone need not be disturbed, as it is in the common .way of taking up the wear by resetting it. This collar j has a broad flange, n, at one end, that is turned true and bolted to the back of the stone, which has a plate, 0,

[also turned true to match flange n of the collar, and thus keep the running-stone perfectly true.

Having thus described my invention, what I claim as new, and desire to secure by Letter r Patent, iser-rod a, by which the stones are pressed to- 1. The combination, with the stones, spindle, and drive-pulley, of thecase b, having bracket i, with a bearing for the spindle, the housing-frame, the base having the pivot h, and the bearing-standard k, the stones and case being adapted to turn on said pivot h, asgand for the purpose described.

. 2, The combination, with the spindle d and levers c and h", of the weight n, rope to, pulley as, carrying pinion y, and the red u, havingrack z, whereby the stones may be pressed together, as described.

3. The case composed of two separable parts,

having trunnions' on the sides, and a bearing for one end of the spindle, and being divided to allow the runner to be removed and to adjust and support the bed-stone for dressing, substantially as described.

4. The combination, with the runner, of the spindle having grooves m, and the two-part screw clamped collar j, having the lip Z,

whereby the runner may be setup without disturbing the bed-stone, as described.

HENRY CUTLER.

Witnesses:

TIMOTHY BROWN, JULrus W. LABARRE. 

